#pragma once

#include <iostream>
#include <unordered_map>
#include <functional>
#include <ctime>
#include <sys/types.h>
#include <unistd.h>


using task_t = std::function<void()>;

void DownLoad()
{
    std::cout << "我是下载任务..., pid: " << getpid() << std::endl;
}

void Log()
{
    std::cout << "我是日志任务..., pid: " << getpid() << std::endl;
}

void Sql()
{
    std::cout << "我是数据库同步任务..., pid: " << getpid() << std::endl;
}


static int number = 0;
class TaskManger
{    
public:
    TaskManger()
    {
        srand(time(nullptr));
        InsertTask(DownLoad);
        InsertTask(Log);
        InsertTask(Sql);
    }
    void InsertTask(task_t t)
    {
        tasks[number++] = t;
    }
    int SelectTask()
    {
        return rand() % number;
    }
    void Excute(int number)
    {
        if(tasks.count(number))
        {
            tasks[number]();
        }
    }
    ~TaskManger()
    {

    }
private:
    std::unordered_map<int,task_t> tasks;
};


TaskManger tm;



void Worker()
{
    while(true)
    {
        int cmd = 0;
        int n = read(0,&cmd,sizeof(cmd));
        if(n == sizeof(cmd))
        {
            tm.Excute(cmd);
        }
        else if(n == 0)
        {
            std::cout << "pid: " << getpid() << " quit..." << std::endl;
            break;
        }
    }
}
